Headgear for a respiratory mask

ABSTRACT

A headgear for a respiratory mask has first and second straps configured to be connected to each other by first and second buckles. The straps are configured to overlap in a region that contacts the rear of a user&#39;s head. The overlapping regions of the first and second straps can be positioned in a bifurcated configuration to improve stability on a user&#39;s head. The first and second buckles can feature a glider end through which one of the first and second straps can slide and a strap attachment end to which the other strap is permanently connected. In some embodiments, the first and second buckles have two components that are pivotally connected to allow adjustment of the headgear size whilst in a bifurcated configuration.

INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS

Any and all applications for which a foreign or domestic priority claimis identified in connection with the present application are herebyincorporated by reference herein and made a part of the presentdisclosure. The present application claims the priority benefit of U.S.Provisional Application No. 62/050,911, filed Sep. 16, 2014, theentirety of which is hereby incorporated by reference herein.

BACKGROUND Technical Field

The present disclosure generally relates to a headgear for a respiratorymask. More particularly, the present disclosure relates to headgearhaving a configuration that can be similar to a single strapconfiguration that is adjustable and configured to be stable on a user'shead.

Description of the Related Art

The treatment of respiratory ailments or conditions with therapies, suchas Non-Invasive Ventilation (NIV), Bi-level or Continuous PositiveAirway Pressure (CPAP), involves the delivery of pressurized air to theairways of a human via a conduit and a breathing apparatus (e.g., arespiratory mask or cannula). Typically, respiratory masks areconfigured as nasal, pillows, full face, or oral interfaces that createat least a substantial “seal” in or around the nose and/or the mouth ofa user.

A result of the respiratory mask creating this “seal” is that thecombination of the enclosure area of the respiratory mask and itsinternal pressure creates a resulting force that attempts to push themask off of the user's face. To counteract this force, it is normal touse a headgear comprising a series of straps that pass around the backand/or the top of a user's head. As shown in FIG. 1, for a relativelysmall respiratory mask 100, such as a nasal or pillows mask, which only“seals” in or around the nose of a user, a headgear 110 comprising asingle elastic strap can be sufficient to counteract the resulting forceand to retain the mask 100 on a user's face. This single elastic strapconfiguration has the benefits of being low profile and unobtrusive forthe user to wear and of making donning and doffing of the respiratorymask 100 quick and easy.

A headgear comprising a single elastic strap may, however, not be asstable on the user's head as a headgear comprising multiple straps andsuch a headgear does not provide users with as much ability to adjustthe fit of the headgear to suit their individual requirements. Singlestraps are more prone to slipping on the back of a user's head duringuse, which may result in the respiratory mask being displaced and the“seal” being broken.

BRIEF SUMMARY

Certain aspects of the present disclosure relate to a headgear for arespiratory mask, which is improved in at least one or more respects orat least provides users with a useful choice.

In accordance with certain embodiments disclosed herein, a headgear cancomprise a first strap, a second strap, and a pair of buckles. The pairof buckles can comprise a corresponding buckle for the first and secondstraps. Each corresponding buckle can comprise a glider portion, a strapattachment portion, and a pivot connection between the glider portionand the strap attachment portion. Each of the first and second strapscan comprise a first end, a second end, and a length therebetween. Eachof the first and second straps can be configured to connect to therespiratory mask at the first end, to adjustably couple to thecorresponding buckle at the glider portion, and to be fixedly coupled tothe strap attachment portion of an other buckle of the pair of bucklesat the second end. Each buckle can be configured to move along thelength of the first or second strap to adjust the size of the headgear.

In various embodiments, the first or second strap can comprise fabric.The first or second strap can comprise a tubular structure. The first orsecond strap can comprise elastic or inelastic material. For at leastone buckle, the glider portion can include at least one aperture throughwhich the first or second strap passes. In some embodiments, for atleast one buckle, the glider portion or the strap portion can comprise acircular profile. In some such embodiments, the glider portion and thestrap attachment portion can comprise a circular profile and can overlapsuch that the buckle forms a single circular profile. In someembodiments, for at least one buckle, the glider portion and the strapattachment portion can comprise a semi-circular profile on one end and arectangular profile on another end. In some such embodiments, the pivotconnection can be located at the semi-circular profile ends of theglider portion and the strap attachment portion. For example, thesemi-circular profile ends can overlap.

In some embodiments, at least one of the first and second straps can beovermoulded to the strap attachment portion of the other buckle, or atleast one of the first and second straps can be welded to the strapattachment portion of the other buckle. For at least one buckle, thepivot connection can comprise a snap-fit dome and a ring.

In various embodiments, the headgear can be configured to be adaptedbetween a first configuration and a second configuration. The firstconfiguration can comprise portions of the first and second strapsoverlapping in a region between the pair of buckles. The secondconfiguration can comprise the portions of the first and second strapsbifurcating in the region of the pair of buckles. In some embodiments,the pair of buckles can be configured to adjust the size of the headgearwhile in the second configuration.

For example, an embodiment of the headgear disclosed herein comprisesfirst and second straps configured to be connected to each other byfirst and second buckles, wherein the straps are configured to overlapin a region that contacts a rear of a user's head, in use. In use, thefirst and second straps of the headgear can be arranged in a bifurcatedconfiguration to improve stability on the user's head.

The first and second buckles can comprise a glider end or half throughwhich one of the first and second straps can slide through and a strapattachment end or fixed strap half to which the other strap can bepermanently connected. In some embodiments, the first and second bucklescomprise two components that are pivotally connected. This may allow thesize of the headgear to be adjusted whilst in a bifurcatedconfiguration.

In accordance with certain embodiments disclosed herein, a headgear cancomprise a first strap, a second strap, and a linking member between thefirst and second straps. Each of the first and second straps cancomprise a mask connection portion, an adjustment portion, and a lengththerebetween. The linking member can comprise a first end and a secondend. The linking member can be coupled to the adjustment portion of thefirst strap via a first buckle at the first end and coupled to theadjustment portion of the second strap via a second buckle at the secondend.

In various embodiments, the first or second strap can comprise fabric.At least one of the first and second straps can comprise a tubularstructure. At least one of the first and second straps can comprise asemi-rigid substrate, and the tubular structure can be configured tomove over the semi-rigid substrate at a corresponding mask connectionportion. At least one of the first and second straps can comprise a hookand loop fastener configured to set the length of the first or secondstrap.

In some embodiments, the linking member can comprise a label. In someexamples, the linking member can comprise a fabric strap. The linkingmember can also comprise a overmoulded or printed grip. The linkingmember can comprise a plastic component. The linking member of variousembodiments can comprise a degree of flexibility configured to allow thelinking member to conform to a user's head.

In some embodiments, the first or second buckle can be a separatecomponent from the linking member. The first or second buckle can bewelded to the linking member. In some other embodiments, the first orsecond buckle can be integrally formed with the linking member. Invarious embodiments, the length of the first and second straps can beadjusted by pulling the adjustment portions of the first and secondstraps.

As another example, another embodiment of the headgear disclosed hereincomprises a label with integrated buckles, wherein the buckles provide amechanism to adjust the length of two attached side straps and, thus,the size of the headgear. The label comprises an elongate textile orplastic component with a non-slip pad or grip attached, such that thelabel is configured to grip to a user's head or hair to improvestability of the headgear.

In accordance with certain embodiments disclosed herein, a headgear cancomprise a single tubular strap comprising a first end, a second end,and a length therebetween. The headgear can also include a first andsecond substrate extending respectively in the first and second ends ofthe strap. Each of the first and second substrates can comprise acorresponding locking geometry configured to secure the strap on thefirst or second substrate.

In various embodiments, the strap can comprise elastic, knitted fabric.The first and second substrates can comprise moulded plastic. The firstand second substrates can be semi-rigid. For each of the first andsecond substrates, the locking geometry can comprise an enlargedgeometry on the substrate. For example, for each of the first and secondsubstrates, the locking geometry can comprise tabs or arms configured tocatch on an inner portion of the strap.

The headgear can further comprise a corresponding hook at the first andsecond ends of the strap. Each corresponding hook can be configured toattach the headgear to a mask. For each strap, the length of the strapcan be configured to be adjusted by moving the strap over the lockinggeometry. In various embodiments, for each strap, the strap can bunchbetween the hook and the locking geometry.

For example, an embodiment of the headgear disclosed herein comprises acircular knitted strap that is configured to encase a substrate, whereinthe substrate comprises a lock that induces increased friction betweenthe substrate and the strap. The increased friction provided by the lockreduces the ease with which the strap can slide over the substrate and,thus, provides an adjustment mechanism for the length of the strap andthe size of the headgear.

In accordance with certain embodiments disclosed herein, a headgear cancomprise a pair of straps adjustably coupled to each other. The headgearcan also include a buckle comprising a first end and a second end. Thebuckle can comprise an adjustment mechanism at each of the first andsecond ends to adjustably couple to a corresponding one of the pair ofstraps such that the pair of straps are adjustably coupled to eachother. Each adjustment mechanism can comprise a pair of rotatable posts.In various embodiments, at least one of the pair of straps can comprisefabric. At least one of the pair of straps can comprise elastic materialor inelastic material.

For example, an embodiment of the headgear disclosed herein comprises abuckle having two adjustment mechanisms configured to provide a way toadjustably connecting two elastic straps. The adjustment mechanismscomprise one or more rotating posts configured to reduce friction suchthat the straps slide through the buckle before they stretch.

In accordance with certain embodiments disclosed herein, a headgear cancomprise at least one side strap. The side strap can comprise aplurality of regions, each region differing from the other regions in atleast one property. The property can include elasticity, flexibility,density, or geometry. In some embodiments, the side strap has fourregions. At least one region can be substantially elastic. At least oneregion can comprise laminated material. The laminated material cancomprise neoprene. At least one region can comprise a curve above andforward of a user's ear. In one example, a first region can be asubstantially straight region comprising laminated foam and fabric(e.g., Breath-O-Prene™) a second region can be a region comprisinglaminated foam and fabric (e.g., Breath-O-Prene™) with a dog-leg, athird region can be a region comprising an elastic strap, and a fourthregion can be a region comprising laminated foam and fabric (e.g.,Breath-O-Prene™) Compared to the laminated foam and fabric (e.g.,Breath-O-Prene™) of the first and second regions, the laminated foam andfabric (e.g., Breath-O-Prene™) of the fourth region can have a lowerdensity.

In some embodiments, the side strap can comprise two side straps. Thetwo side straps can be adjustably connected at the rear of a user's headvia a connector. For example, the connector can be a buckle. Theheadgear can comprise a length securement component that comprises ahook and loop type fastener.

As another example, a further embodiment of the headgear disclosedherein comprises single strap configuration, wherein two straps thatcomprise a plurality of regions with differing physical attributes areadjustably connected at the rear of a user's head.

In accordance with certain embodiments disclosed herein, a headgear cancomprise a single tubular strap comprising a first strap end, a secondstrap end, and a length therebetween. The headgear can also comprise aresilient core housed within the strap. The resilient core can comprisea first core end and a second core end. In some embodiments, the strapcan comprise a fabric. The strap can comprise elastic or inelasticmaterial.

In some embodiments, each of the first strap end and the second strapend extends respectively beyond the first core end and the second coreend of the resilient core. Each of the first strap end and the secondstrap end can pass through a corresponding connector configured tocouple the headgear to a mask. The length of the strap can be configuredto be adjusted by moving each of the first and second strap ends througha corresponding loop of the corresponding connector.

In some embodiments, the resilient core can be configured to extendaround a back of a user's head. The resilient core can be configured toextend forward of a user's ears and rearward of the mask. The resilientcore can comprise moulded plastic. Furthermore, the resilient core cancomprise a three-dimensional structure that passes below a user's eyesand above a user's ears.

As yet another example, an embodiment of the headgear disclosed hereincomprises a knitted elastic strap that is tubular and that is configuredto encase a resilient core. The resilient core can be configured toextend around a rear of a user's head, between their cheeks, and cancomprise a ‘dog leg’ or ‘s’ shaped geometry to direct the strap awayfrom the user's eyes and ears.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a nasal respiratory mask in use with asingle strap elastic headgear.

FIG. 2a is a perspective view of a first embodiment of a headgear of thepresent disclosure.

FIG. 2b is a diagrammatic view of the adjustment of the headgear of FIG.2 a.

FIG. 3 is a perspective view of a first embodiment of the buckle of theheadgear of FIGS. 2a and 2 b.

FIG. 4 is a perspective view of the headgear of FIGS. 2a and 2b in abifurcated arrangement.

FIG. 5 is a perspective view of a second embodiment of the buckle of theheadgear of FIGS. 2a, 2b and 4.

FIG. 6 is a perspective view of a third embodiment of the buckle of theheadgear of FIGS. 2a, 2b and 4.

FIG. 7 is a perspective view of a fourth embodiment of the buckle of theheadgear of FIGS. 2a, 2b and 4.

FIG. 8 is a perspective view of a fifth embodiment of the buckle of theheadgear of FIGS. 2a, 2b and 4.

FIG. 9a is a perspective view of a sixth embodiment of the buckle of theheadgear of FIGS. 2a, 2b and 4.

FIG. 9b is a cross-sectional view of the sixth embodiment of the buckleof the headgear of FIGS. 2a, 2b and 4.

FIG. 10 is a perspective view of a second embodiment of a headgear ofthe present disclosure, worn by a user.

FIG. 11 is a front view of a second embodiment of the label withintegrated buckles of the headgear of FIG. 10.

FIG. 12a is a perspective view of a third embodiment of the label withintegrated buckles of the headgear of FIG. 10.

FIG. 12b is a cross-sectional plan view of the third embodiment of thelabel with integrated buckles of the headgear of FIG. 10.

FIGS. 13a and 13b are perspective views of a third embodiment of theheadgear of the present disclosure, worn by a user.

FIG. 14 is a front view of several embodiments of the lock of theheadgear of FIGS. 13a and 13 b.

FIG. 15a is a perspective view of a fourth embodiment of the headgear ofthe present disclosure, worn by a user.

FIG. 15b is a cross-sectional diagrammatic view of the adjustmentmechanism of the headgear of FIG. 15 a.

FIG. 16 is a side view of a fifth embodiment of the headgear of thepresent disclosure, worn by a user.

FIG. 17 is a side view of a sixth embodiment of the headgear of thepresent disclosure, worn by a user.

DETAILED DESCRIPTION

Various embodiments of a headgear, e.g., for a respiratory mask, aredisclosed herein. The embodiments have a configuration similar to asingle strap configuration providing the benefits of a single strapconfiguration (e.g., low profile, unobtrusive, ease of use, etc.), yetare also configured to be stable on a user's head to reduce the risk ofdisplacing the mask. Various embodiments described herein are alsodesigned to conform to a user's face and/or head, to avoid discomfortfrom being too close to the user's eyes and ears, and to be adjustable.It is understood that one or more features described herein for oneembodiment can be used with one or more features described herein foranother embodiment.

Overlapping Straps Headgear

FIGS. 2a and 2b show an example headgear 200 in accordance with certainembodiments described herein that is configured to provide improvedadjustability and stability. In certain embodiments, the headgear 200,e.g., for a respiratory mask, can comprise a first strap 210, a secondstrap 220, and a pair of buckles 230, 240. The pair of buckles 230, 240can include a corresponding buckle 230, 240 for the first and secondstraps 210, 220. In various embodiments, each of the first and secondstraps 210, 220 can comprise a first end, a second end, and a lengththerebetween. Each buckle 230, 240 can be configured to move along thelength of the first or second strap 210, 220 to adjust the size of theheadgear 200. In some embodiments, each of the first and second straps210, 220 can be configured to connect to a respiratory mask 100 at thefirst end. Each of the first and second straps 210, 220 can also beconfigured to adjustably couple to the corresponding buckle 230 or 240.Furthermore, each of the first and second straps 210, 220 can beconfigured to be fixedly coupled to the other buckle 230 or 240 at thesecond end.

For example, as shown in FIGS. 2a and 2b , the headgear 200 comprisesfirst and second straps 210, 220 and first and second buckles 230, 240.The first and second straps 210, 220 are configured to have two ends,wherein one end is provided with a connector, such as a hook or clipfeature (not shown), that connects to a respiratory mask and the otherend connects to one of the first or second buckles 230, 240. The firststrap 210 is configured to connect to a respiratory mask at one end,pass through the first buckle 230, and permanently connect to the secondbuckle 240 at the other end. The second strap 220 is configured toconnect to a respiratory mask at one end, pass through the second buckle240, and permanently connect to the first buckle 230. The first andsecond straps 210, 220 are configured to overlap each other in a regionbetween the first and second buckles 230, 240. The overlapping region ispositioned at the rear of a user's head, in use. As shown in FIGS. 2aand 2b , the overlapping portions of the first and second straps 210,220 in the region between the first and second buckles 230, 240 canallow the headgear 200 to have a configuration similar to a single strapconfiguration even though the headgear 200 comprises multiple straps210, 220.

Further, although the headgear 200 has multiple straps 210, 220, theheadgear 200 can be configured to be adjustable in length. For example,as shown in FIG. 2b , by moving the first and second buckles 230, 240closer together, the amount of overlap between the first and secondstraps 210, 220 is reduced and the overall length of the headgear isincreased. Moving the first and second buckles further apart has thereverse effect of increasing the overall length of the headgear 200. Forexample, by moving the first and second buckles 230, 240 further apart,the amount of overlap between the first and second straps 210, 220 isincreased and the overall length of the headgear 200 is reduced. Inother embodiments, by moving the buckles 230, 240 closer together, theoverall length of the headgear is reduced, and by moving the buckles230, 240 further apart, the overall length of the headgear is increased.In various embodiments, the length of the headgear 200 can be adjustedmost easily when it is under tension, such as when it is being worn by auser.

The material, shape, size (e.g., length, width, thickness), color,and/or other physical properties of the first and second straps 210, 220are not particularly limited, but can be based on the intended mask(e.g., relatively large, medium, or small in size), the intended user(e.g., adult, child, or infant) and/or expected force to counteract(e.g., relatively large, medium, or small in amount). The material,shape, size, color, and/or other physical properties of the first strap210 can be the same as or different from those of the second strap 220.In certain embodiments, the first and/or second straps 210, 220 cancomprise fabric. In some embodiments, the first and/or second straps210, 220 can comprise a tubular shape. For example, in one embodiment,the first and/or second straps 210, 220 can be made from a length ofknitted tubular elastic. In some embodiments, the straps 210, 220 may bemade from any elastic or inelastic material, including, but not limitedto, textiles, extruded or moulded plastics or laminated materials (e.g.,a material comprising neoprene or Breath-o-prene™).

FIG. 3 shows a non-limiting exemplary embodiment of the first and secondbuckles 230, 240. The first and second buckles 230, 240 comprise aglider portion (e.g., a glider end 300) and a strap attachment portion(e.g., a strap attachment end 310). The glider end 300 can be an endthrough which the first or second straps 210 or 220 can slide, e.g.,allowing the size of the headgear to be adjusted. For example, in FIG.3, the glider end 300 comprises a pair of substantially rectangularapertures 302 that are positioned adjacent to each other proximal to oneend of the buckle 230, 240. The apertures 302 are offset from each othersuch that a post 304 is formed between them. The apertures 302 and thepost 304 are configured to provide a torturous path through which one ofthe first or second straps 210, 220 may be threaded. The first or secondstrap 210, 220 is threaded through one aperture 302, over the post 304,and back through the second aperture 302. Alternatively, the first orsecond strap 210, 220 is threaded through one aperture 302, under thepost 304, and back through the second aperture 302 The dimensions of theapertures 302 and first and/or second strap, 210, 230 can be definedsuch that the friction forces induced between them restrict freemovement of the strap through the glider end 300. The first or secondbuckle 230, 240 slides along the first or second strap 210, 220 via theglider end 300 when the user applies an intentional force to it butremains in a semi-fixed position under forces that are applied to theheadgear 200 when it is being worn by a user. Accordingly, each buckle230, 240 can be configured to move along the length of the first orsecond strap 210, 220 to adjust the size of the headgear 200.

The strap attachment end 310 is configured to be fixedly coupled, e.g.,permanently attached in some instances, to one end of the first orsecond strap 210, 220. It is attached to which ever strap 210, 220 doesnot pass through the glider end 300. The attachment can be formed byover-moulding the buckle 300 to one end of the first or second strap210, 220. In alternative embodiments, the attachment may be provided byother appropriate means, such as, but not limited to, welding, gluing,or a mechanical clip. The term ‘welding,’ as used herein, can refer toany type of welding commonly used to connect plastic components. In someembodiments, the attachment end 310 may include a further aperturethrough which the strap 210, 220 is threaded; the strap is then securedto itself by sewing or any other appropriate technique.

The example buckle for the first and second buckles 230, 240 is shown inFIG. 3 as rectangular in shape with curved corners. However, the shapeis not particularly limited. For example, the shape of the first and/orsecond buckle 230, 240 can be circular, ovular, regular or irregularpolygonal, etc. Further, the material, size, color, and/or otherphysical properties of the buckles 230, 240 are not particularlylimited. The material, shape, size, color, and/or other physicalproperties of the first buckle 230 can be the same as or different fromthose of the second buckle 240.

In addition, the apertures 302 and post 304 of the buckles 230, 240 areshown in FIG. 3 as rectangular. However, the shapes of the apertures 302and post 304 are not particularly limited. For example, the shapes ofthe apertures 302 and/or post 304 can be circular, ovular, regular orirregular polygonal, etc. Further, the size of the apertures 302 andpost 304 are not particularly limited. The shape and size of theapertures 302 and/or post 304 of the first buckle 230 can be the same asor different from those of the second buckle 240. Additionally, theexample buckle for the first and second buckles 230, 240 is shown inFIG. 3 as having two apertures 302 and one post 304. However, in someembodiments, the first and/or second buckle 230, 240 can have more thantwo apertures 302 and/or more than one post 304, e.g., to provide a moretorturous path through which the first and/or second straps 210, 220 maybe threaded. Further, the shape and size of the apertures 302 and/orposts 304 within a buckle 230 or 240 can be the same as or differentfrom each other.

Some embodiments of the buckles 230, 240 may have a plurality ofapertures 302 but can be used with the first or second strap 210, 220only going through one of the apertures 302. In some embodiments, thefirst and/or second buckle 230, 240 have only one aperture 302.

FIG. 4 shows how the headgear 200 can provide improved stability on theuser's head. For example, the headgear 200 can be configured to beadapted between a first and a second configuration. The firstconfiguration can comprise portions of the first and second straps 210,220 overlapping in a region between the first and second buckles 230,240 (see, e.g., FIG. 3). The second configuration, as shown in FIG. 4,can comprise the portions of the first and second straps 210, 220bifurcating in the region between the first and second buckles 230, 240.The overlapping first and second straps 210, 220 are moved apart fromeach other on the user's head, such that a bifurcated headgearconfiguration is provided. The bifurcated configuration providesadditional contact points on the user's head, which may counteractadditional force vectors and thus minimize the likelihood of theheadgear 200 moving up and/or down and displacing the respiratory maskon the user's face. The first and second buckles 230, 240 provide pivotpoints at which the first and/or second straps 210, 220 bend at an angleto sit lower or higher on the back of the user's head. As seen in FIG.4, the bifurcation of the first and second straps 210, 220 results inmisalignment of the straps within the buckles 230, 240. Thismisalignment may, in some cases, cause bunching in the strap, which mayrestrict adjustments to the length of the headgear whilst it is in thebifurcated configuration. Advantageously, in various embodiments, theheadgear 200 can include multiple straps to provide a stable headgear,yet can be configured to adjust the size of the headgear 200. Further,in some embodiments, the headgear 200 can be adjusted while in thebifurcated configuration.

FIGS. 5 to 9 show a variety of non-limiting exemplary embodiments ofbuckles that may be used in a headgear configuration such as thatdescribed in relation to FIGS. 2 and 4. In such embodiments, the firstand/or second buckles 230, 240 can include a pivot connection betweenthe glider portion and the strap attachment portion. For example, eachof these buckles comprises two components that are pivotally connected.The pivotal connection allows the headgear to be used in a bifurcatedarrangement with reduced bending of the straps and also isolates theglider function of the glider portion of the buckle from the fixed strapconnection of the strap attachment portion. This consequently allows thelength of the headgear to be adjusted whilst in bifurcated arrangement.

The buckle 500 of FIG. 5 comprises a glider portion (e.g., a glider half510), a strap attachment portion (e.g., a fixed strap half 520), and apivot connection 530. The glider half 510 comprises a strap end 512,which has a substantially rectangular profile, and a glider pivot end514, which has a semi-circular profile, at the opposing end. The strapend 512 comprises a loop 516 through which the first or second strap210, 220 is configured to pass. The loop 516 may apply a friction forceto the first or second strap 210, 220 such that the buckle 500 onlyslides along the strap when an intentional force is applied. The gliderpivot end 514 can be configured to connect with a corresponding fixedpivot end 522 of the fixed strap half 520.

The fixed strap half 520 comprises the fixed pivot end 522 at one endand a strap connection 524 at the opposing end, wherein the fixed pivotend 522 has a semi-circular profile and the strap connection has asubstantially rectangular profile. The pivot connection 530 can belocated at the semi-circular profile ends of the glider half and fixedstrap half (e.g., at the glider pivot end 514 and the fixed pivot end522). In this example, the semi-circular profile ends 514, 522 overlapsuch that the overall profile of the buckle 500 has a rectangularprofile. The strap connection 524 comprises an opening that isconfigured to receive an end of the first or second strap 210, 220. Theend of the first or second strap 210, 220 is fixedly coupled, e.g.,permanently fixed in some instances, within the strap connection 524 inany suitable way, such as, but not limited to, over-moulding or welding.The pivot connection 530 comprises geometry on both the glider half 510and the fixed strap half 520 (not shown) that allows the glider half andthe fixed strap half to rotate relative to each other, as shown by thearrows. In some embodiments, the geometry of the pivot connection 530may include a snap-fit dome and ring configuration (not shown). Whenassembled within the headgear 200, the first or second strap 210, 220passes through the loop 516 and over the fixed pivot end 522 of thefixed strap half 520.

FIG. 6 provides another embodiment of a buckle 600. The illustratedembodiment comprises a glider portion (e.g., a glider half 610), a strapattachment portion (e.g., a fixed strap half 620), and a pivotconnection 630. The glider half 610 has a strap end 612, which has arectangular profile and comprises a rectangular aperture 614 with araised cross-bar 616. The strap end 612 is configured to provide atorturous path through which the first or second strap 210, 220 passes.The first or second strap 210, 220 passes through the aperture 614, andbeneath (or above) the raised cross-bar 616, thereby allowing foradjustment of the buckle 600 position along the length of the strap 210or 220. The raised cross-bar 616 is configured to apply a friction forceto the first or second strap 210, 220 that passes beneath it. The raisedcross-bar 616 may provide for a lower profile headgear compared to thatdiscussed above. The glider half 610 also comprises a glider pivot end618 that has a semi-circular profile and is configured to connect with acorresponding fixed pivot end 622 of the fixed strap half 620.

The fixed strap half 620 comprises the fixed pivot end 622 at one endand a strap connection 624 at the opposing end. The fixed pivot end 622has a semi-circular profile and the strap connection 624 has asubstantially rectangular profile. The pivot connection 630 can belocated at the semi-circular profile ends of the glider half and fixedstrap half (e.g., at the glider pivot end 618 and the fixed pivot end622). In this example, the semi-circular profile ends 618, 622 overlapsuch that the overall profile of the buckle 600 has a rectangularprofile. The pivot connection 630 comprises a snap-fit dome 632 and asnap-fit ring 634, wherein the snap-fit ring 634 is configured toreceive and rotate about the snap-fit dome 632. The snap-fit dome 632 isconfigured to form part of the fixed strap half 620 and the snap-fitring 634 forms part of the glider half 610. The illustrated snap-fitdome 632 is substantially mushroom shaped.

FIG. 7 shows an embodiment of a buckle 700 comprising a glider half 710,a fixed strap half 720 and a pivot connection 730. The glider half 710has a circular profile. The glider half 710 comprises an inner surface712, a substantially cylindrical side wall 714 and a ring shaped outersurface 716. The inner surface 712 comprises a substantially planarbearing surface that contacts a corresponding bearing surface on thefixed strap half 720 and forms the snap-fit ring 732 of the pivotconnection 730. The cylindrical side wall 714 comprises an entry slot718 and an exit slot 719 through which the first or second strap 210,220 extends radially across the diameter of the glider half 710. Theouter surface 716 is configured to retain the first or second strap 210,220 within the glider half 710.

The pivot connection 730 comprises the snap-fit ring 732 and a snap-fitdome 734. The snap-fit ring is 732 configured to receive and rotateabout the snap-fit dome 734, which has a substantially mushroom shapedgeometry in the illustrated configuration. The snap-fit dome can beconfigured to extend into the centre of the glider half 710 such that itimpinges upon, and applies a friction force to, the first or secondstrap 210, 220 as the strap passes through the slots 718 of the gliderhalf 710.

The buckle 800 shown in FIG. 8 has a pivot connection 830 that comprisesa snap-fit female ring 832 and a snap-fit male ring 834. The snap-fitfemale ring 832 can be configured in any suitable manner, including thesame as the snap-fit ring 732 of the previous embodiment. The snap-fitmale ring 834 differs from snap-fit dome 734 in that a circular holeextends through the centre. The circular hole results in the snap-fitmale ring having a cylindrical wall that is pivotally received by thesnap-fit female ring 832. This configuration may make it easier in someembodiments to connect the glider half 810 to the fixed strap half 820as a result of the cylindrical wall of the snap-fit male ring 834flexing during insertion into the snap-fit female ring 832. The snap-fitdome 734 of the previous embodiment can be a solid component that cannotflex in some embodiments. This configuration also provides an appearancethat is similar on both sides of the buckle, which may reduce oreliminate the likelihood of user confusion.

FIGS. 9a and 9b show an embodiment of a buckle 900 wherein both gliderand fixed strap halves 910, 920 are substantially (e.g., completely)circular in profile. The circular profiles can overlap such that thebuckle 900 can form a single circular profile. The buckle comprises aglider half 910 and a fixed strap half 920 that are pivotally connectedthrough a central axis A. The glider half 910 can be similar to theglider halves 710 and 810 of the previous embodiments. The fixed straphalf 920 can be similar in geometry to the glider half 910. The fixedstrap half 920 can be substantially cylindrical and comprises aninternal wall 922, a side wall 924 and an outer ring 926. The internalwall comprises a snap-fit dome 934 and a strap connection surface 923.The snap-fit dome 934 forms part of the pivot connection 930 and isconfigured to be received by the snap-fit ring 932 of the glider half910. It can be seen in FIG. 9b that the snap-fit dome 934 has asubstantially mushroom shaped cross-section, which extends into theglider half 910 such that it interferes with the strap path (indicatedby the arrow). The snap-fit dome 934 causes the first or second strap210, 220 to follow a torturous path, which causes friction forcesbetween the strap and the buckle 900, thus providing controlled movementof the buckle 900.

The strap connection surface 923 is configured to provide asubstantially flat surface to which the end of the first or second strap210, 220 is fixedly coupled, e.g., permanently secured via welding. Insome embodiments, the end of the first or second strap 210, 220 may beconnected to the fixed strap half 920 by other methods, such as, but notlimited to, adhesives or over-moulding.

The side wall 924 comprises a cylindrical wall that extends between theperimeter of the internal wall 922 and the perimeter of the outer ring926. The side wall 924 also comprises an entry slot 925 through whichthe first or second strap 210, 220 passes before being secured to thestrap connection surface 923.

The outer ring 926 is configured to further secure the end of the firstor second strap 210, 220 within the fixed strap half 920. The outer ring926 comprises a central opening that is configured to expose a portionof the first or second straps 210, 220. The exposed strap portion mayprovide some cushioning against the users head, in use, and may providean appearance that matches the glider half 910. It is beneficial for theappearance of the glider half 910 and the fixed strap half 920 to begenerally the same because it means that the buckle 900 is reversible.The reversibility of the buckle 900 means that it can be used as both afirst and second buckle without the need to produce separate ‘left’ and‘right’ configurations. The buckles 900 can be alternated so that onehas the glider half 910 proximal to the user's head and the other hasthe fixed strap half 920 proximal to the user's head.

Accordingly, certain embodiments of a headgear, e.g., for a respiratorymask, can include multiple straps 210, 220 and a pair of buckles thatprovide a stable headgear that can adjust the size of the headgear. Asdescribed herein, the material, shape, size, color, and/or otherphysical properties of the first or second straps 210, 220 are notparticularly limited. The first and second straps 210, 220 can include afirst end, a second end, and a length therebetween. The pair of bucklescan include a corresponding buckle for the first and second straps 210,220. The pair of buckles can include two buckles that are substantiallysimilar to each other. However, it would be understood that the bucklescan be different from each other.

In various embodiments, the headgear can be configured to be adaptedbetween a first and second configuration. For example, the firstconfiguration can be similar to a single strap configuration, e.g.,portions of the first and second straps 210, 220 overlapping in a regionbetween the pair of buckles. The second configuration can be abifurcated configuration, e.g., portions of the first and second straps210, 220 bifurcating in the region between the pair of buckles. In somesuch embodiments, the pair of buckles can be configured to adjust thesize of the headgear while in the bifurcated configuration.

In some such embodiments, each of the buckles can include a gliderportion, a strap attachment portion, and a pivot connectiontherebetween. Each of the first and second straps 210, 220 can beconfigured to connect to a respiratory mask at the first end, toadjustably couple to the corresponding buckle at the glider portion, andto be fixedly coupled to the strap attachment portion of the otherbuckle at the second end. Each buckle can be configured to move alongthe length of the first or second strap 210, 220 to adjust the size ofthe headgear 200.

The material, shape, size, color, and/or other physical properties ofthe glider and/or strap attachment portions are not particularlylimited. The material, shape, size, color, and/or other physicalproperties of the glider portion can be the same as or different fromthose of the strap attachment portion. Various modifications to thestraps 210, 220 and/or buckles can be made.

Combined Label Buckle

In certain embodiments, a headgear, e.g., for a respiratory mask, caninclude a first strap and a second strap. Each of the first and secondstraps can comprise a mask connection portion, an adjustment portion,and a length therebetween. The headgear can also include a linkingmember between the first and second straps. The linking member cancomprise a first end and a second end. The linking member can be coupledto the adjustment portion of the first strap via a first buckle at thefirst end and coupled to the adjustment portion of the second strap viaa second buckle at the second end. For example, FIG. 10 shows a headgear1000 comprising a pair of side straps 1010 (only one is visible, butanother side strap 1010 is provided on the other side of the user'sface), a linking member (e.g., a label 1020), and a pair of buckles 1030(only one is visible). In some embodiments, one or more of the sidestraps 1010 are made of a tubular structure, such as a tubular knittedcovered elastic, and comprise a mask connection portion (e.g., a maskend 1012), an adjustment portion (e.g., an adjustment end 1014), and afastening tab 1016. The tubular structure can be knitted or formed intoa tube by some other method (e.g., by sewing). At least one of thestraps 1010 can comprise a semi-rigid substrate, and the tubularstructure can be configured to move over the semi-rigid substrate at acorresponding mask end 1012. In various embodiments, the semi-rigidsubstrate can form a connection to the mask and provide a structure thathelps keep the straps 1010 below the user's eyes. For example, in someembodiments, the mask end 1012 is configured to connect to a semi-rigidsubstrate, such as a connector or hook (not visible) or other featurethat provides a connection to a respiratory mask. The mask end 1012 hasan open end, such that the tubular side strap 1010 can be slid over anelongate hook structure (shown by the curve in the side strap 1010proximal to the mask end 1012). The mask end 1012 is held in place byfriction between the hook and the side strap 1010. In other embodiments,the mask end 1012 may be connected to a hook or connection feature byany other appropriate method, including, but not limited to,over-moulding or a mechanical clip.

The adjustment end 1014 is configured to pass freely through the buckle1030 and fold back on itself before being secured in place by thefastening tab 1016. The overall size of the headgear 1000 is determinedby how much of the adjustment end 1014 is folded back on itself. Forexample, the straps 1010 can be adjusted by pulling the adjustment endsof the straps 1010. The fastening tab 1016 comprises the hook componentof a ‘hook and loop’ fastening system, such as Velcro™. It is configuredto attach to the side strap, which forms the loop component of thefastening system, thus setting and securing the length of the side strap1010 and the size of the headgear 1000. In alternative embodiments, theadjustment end may be secured by other means, such as a mechanical clipor a buckle that provides a torturous path.

In various embodiments, the label 1020 comprises an elongate textilemember that is substantially inelastic in comparison to the side straps1010. For example, the label 1020 can include a fabric strap. In use,the label 1020 is configured to extend laterally across the rear of theuser's head. In some embodiments, the label 1020 has company brandingapplied to its outer surface. The label 1020 can include an overmouldedor printed grip, e.g., a grip to help maintain the position of theheadgear on the user's head. In some embodiments, the label 1020 caninclude a plastic component, e.g., a moulded plastic component. Thelabel 1020 can have a degree of flexibility configured to allow thelabel 1020 to conform to the user's head, e.g., for comfort. Asexamples, the label 1020 may comprise a non-slip pad (not shown) madefrom a material, such as, but not limited to, silicone, thermoplasticelastomer (TPE), or thermoplastic polyurethane (TPU), wherein the pad ispermanently attached to the label by means, such as, but not limited to,sewing or gluing. In alternative embodiments, the label 1020 cancomprise an elastic textile, or other suitable material, such as aclosed cell foam or plastic.

In certain embodiments, one or both of the pair of buckles 1030 can beseparate components from the label 1020. For example, the buckles 1030can be substantially rigid plastic components that comprise a loop 1032,through which the side straps 1010 are configured to pass, and anattachment tab (not visible). The loop 1032 has a substantiallyrectangular profile; however, in alternative embodiments, othergeometries may be used. In some embodiments, the attachment tab (notvisible) is configured to be fixedly coupled, e.g., permanentlyconnected, to the label 1020. For example, the buckles 1030 can beconfigured to be permanently attached to each of the lateral ends of thelabel 1020, such that the label and buckles 1030 form a singlecomponent. The connection may be formed by welding, sewing, gluing,over-moulding or any other appropriate method.

FIG. 11 shows an alternative embodiment of a label 1100 with integratedbuckles that may be used in combination with the headgear 1000 shown inFIG. 10. In some such embodiments, being integrally formed can reduceassembly and manufacturing costs. The label 1100 with integrated bucklescomprises a label 1110 and a pair of buckles 1120. In some embodiments,the label 1110 comprises a symmetrical elongate textile component,wherein the long edges have a convex curve, such that the middle of thelabel is wider than the lateral ends 1114. The label 1110 also comprisesa grip 1112 located on one side. The grip 1112 comprises a silicone,TPE, or TPU pad that substantially follows outline of the label 1110.The grip is configured to provide a non-slip surface that, in use, gripsthe user's head or hair, such that the headgear 1000 is stable and isless likely to slip down and displace the respiratory mask. The grip1112 may be applied to the label 1110 using any suitable techniques,such as, but not limited to, screen printing, pad printing, andover-moulding.

The buckles 1120 comprise a loop 1122 at one end and an attachment tab1124 at the opposing end. The loop 1122 comprises an elongate openingthrough which the side straps 1010 freely pass. The tab is configured tobe fixedly coupled, e.g., permanently fixed, to the label 1110 via anysuitable process, such as, but not limited to, welding.

FIGS. 12a and 12b show a third embodiment of a label 1200 withintegrated buckles that can be used in combination with the headgear1000 shown in FIG. 10. The label 1200 comprises integrated buckles 1220and an elongate body 1210 configured to be moulded from a flexible andresilient material, such as silicone or a TPE, with a textured surface.The textured surface on such a material provides a relatively high levelof friction with the user's head, which helps to maintain the placementof the headgear 1000. The elongate body 1210 has a three-dimensionalstructure that is curved along its length, such that it substantiallymatches the curvature of the rear of a user's head. The elongate body1210 has a stepped geometry 1212 at each of the lateral ends 1214,wherein the cross-sectional wall thickness of the elongate body isreduced. This stepped geometry 1212 forms part of an integrally mouldedbuckle 1220 in combination with a crossbar 1222 that is offset from thestepped geometry 1212. The buckles 1220 are configured such that a sidestrap 1010 passes between the stepped geometry 1212 and the crossbar1222 and then folds back on itself, thereby following a torturous path.The clearance between the stepped geometry 1212 and the crossbar 1222 issuch that an intentional force has to be applied to the side strap 1010in order to overcome the friction forces and pull the strap through thebuckle 1220, thereby adjusting the size of the headgear 1000.

Bunched Adjustment

In certain embodiments, a headgear, e.g., for a respiratory mask,includes a single tubular strap comprising a first end, a second end,and a length therebetween. A first and/or a second substrate can extendrespectively in the first and second ends of the strap. The first and/orthe second substrate can comprise a corresponding locking geometryconfigured to secure the strap on the first and/or second substrate. Thelength of the strap can be adjusted by moving the strap over the lockinggeometry. For example, FIGS. 13a and 13b show a headgear 1300 comprisinga strap 1310 and a pair of mask connectors 1320 (only one is visible).Only one side of the strap 1310 is described herein, but it would beunderstood that the other side of the strap 1310 can be similar ordifferent. The strap 1310 can comprise elastic, knitted fabric. Forexample, in some embodiments, the strap 1310 comprises a circularknitted elastic sheath that is configured to have an opening at eachend. The mask connectors 1320 comprise a hook 1330 at one end and anelongate substrate 1340 (inside strap 1310) at the other end, whereinthe hook 1330 is configured to connect to a mask frame 1350 and thesubstrate 1340 is configured to be inserted into and retain the strap1310.

In various embodiments, the substrate 1340 comprises an elongate memberthat is wider than it is thick. It may include a curved geometry thatallows it to substantially match the curve of a user's cheek. Thesubstrate 1340 can comprise a moulded plastic. In some embodiments, thesubstrate 1340 is made from a solid but somewhat flexible material, suchas nylon, polypropylene, or polycarbonate. Flexibility is desirable in adirection that is normal to the user's cheeks because it allows thesubstrate to better match the facial geometry of individual users. Theflexibility of the substrate is relative to its thickness. The width Wof the substrate 1340 can be such that flexibility in a verticaldirection (when being worn by a user whilst sitting upright) is limited.Restricted vertical flexibility can improve the stability of the maskseal on the user's face. The substrate 1340 can rest against a user'scheek and can act as a brace that restricts twisting and bending of thestrap 1310. Accordingly, in various embodiments, the substrate 1340 issemi-rigid to provide structure and conformance to the user's face andto help keep the strap 1310 away from the user's eyes and ears.

The substrate 1340 also comprises a locking geometry that comprises anenlarged geometry (e.g., a lock 1342 that is positioned approximatelynear a middle of the substrate length). The enlarged geometry canprovide increased friction with the strap 1310. For example, in someembodiments, the lock 1342 comprises a section of the substrate 1340that is wider than the strap 1310. The width of the lock 1342 is suchthat the strap 1310 has to stretch over the lock 1342, which causes thefriction between the strap 1310 and the substrate 1342 to be greatlyincreased at this location. The friction is substantial enough to reduceor eliminate the likelihood of the strap 1310 being pulled over the lock1342 when the headgear is being worn during normal use. As such, thelock 1342 is configured to provide a means of adjusting the length ofthe strap 1310 and, thus, the overall size of the headgear 1300. Toreduce the size of the headgear 1300, the strap 1310 is pushed forwardover the lock 1342, towards the hook 1330. Depending on the desiredsize, this can result in the strap bunching up between the hook 1330 andthe lock 1342, as shown in FIG. 13b . To increase the size of theheadgear 1300, the strap 1310 can be pulled over the lock 1342, awayfrom the hook 1330.

FIG. 14 shows a variety of configurations that the lock 1342 may take.In some configurations, the ease with which the length of the strap 1310can be adjusted is biased towards one direction. For instance,configurations ‘a’ and ‘d’ may make it easier to shorten the head-straplength than to extend it. The steeper increase in substrate width w atone end can increase the friction between the strap 1310 and thesubstrate 1340, thereby making it more difficult for the strap 1310 topass over the substrate 1340 in one direction.

In various embodiments, the lock 1342 comprises one or more features,e.g., arms or tabs, configured to press against or catch on an innerportion of the strap 1310. For example, configuration ‘e’ comprisescurved arms 1400 that extend from the width of the substrate 1340 andare open at one end. When the strap 1310 is pulled over the open end ofthe arms 1400 (to extend the strap length), the arms 1400 tend todeflect outward and the strap tends to press against or catch on theends and extension of the strap length will be restricted. When thehead-strap is pulled over the lock 1342 in the other direction, thecurved arms 1400 deflect inwards at the open end, thereby reducing thewidth of the substrate 1340 and the associated friction. The inwarddeflection of the arms 1400, therefore, makes it easier to shorten thelength of the strap 1310.

Configurations ‘f’ and ‘g’ include raised tabs 1410 that extend from thethickness of the substrate 1340. The tabs 1410 have a substantiallyrectangular profile, wherein three sides of the tab are detached fromthe substrate 1340. The connected side of the tabs 1410 forms a livinghinge with the substrate 1340, such that the tabs 1410 flex in and outof alignment with the surface of the substrate 1340. The detached endwill catch on the strap 1310 in a similar manner to the curved arms 1400of configuration ‘e’ when the strap 1310 is pulled over the lock 1342 ina direction that moves from the detached end towards the hinged end ofthe tab 1410.

Rotating Post Buckle

In certain embodiments, as shown in FIGS. 15a and 15b , a headgear 1500,e.g., for a respiratory mask, can include a pair of straps 1510adjustably coupled to each other, and a buckle 1520. The buckle 1520comprises a first end and a second end. The buckle 1520 comprises anadjustment mechanism 1540 at each of the first and second ends of thebuckle 1520 to adjustably couple to a corresponding one of the pair ofstraps 1510. Each adjustment mechanism 1540 can comprise a pair ofrotatable posts 1542. For example, FIG. 15a shows the rear portion of aheadgear 1500 comprising first and second straps 1510 and a buckle 1520,wherein the first and second straps 1510 are adjustably connected by thebuckle 1520 at the rear of a user's head (in use). The first and secondstraps 1510 are coupled to the mask or a mask connector on the other endof the straps 1510 (not shown). In some embodiments, the first and/orsecond straps 1510 comprise fabric. In addition, in some embodiments,the first and/or second strap 1510 can comprise elastic material. Forexample, the first and/or second straps 1510 can comprise a length ofknitted elastic material, which may or may not be tubular.

In some embodiments, the buckle 1520 comprises a plastic body 1530. Forexample, the plastic body 1530 in some embodiments comprises a first oran upper arm 1532, a second or a lower arm 1534 and a stem 1536 thattogether form a substantially ‘I’ shaped profile, and an adjustmentmechanism 1540 located within each lateral side of the plastic body(e.g., one for each strap 1510). Each of the adjustment mechanisms 1540can comprise a pair of posts 1542 that are offset from each other. Insome embodiments, the posts 1542 are configured to extendperpendicularly between, and be rotatably coupled to, the upper arm 1532and the lower arm 1534.

In various embodiments, the adjustment mechanisms 1540 are configured toallow the straps 1510 to be threaded around the posts 1542 in atorturous path that is substantially ‘s’ shaped, as shown in FIG. 15b .This torturous path induces friction forces between the straps 1510 andthe adjustment mechanisms 1540, such that the straps 1510 are retainedat a user defined length. As a result of the straps 1510 being elasticin some embodiments, it can be difficult to draw them through a bucklewith fixed posts. This is because the strap 1510 tends to stretch beforethe friction between the strap and the buckle is overcome. In certainembodiments, the adjustment mechanisms 1540 of the present disclosureutilize the rotatably coupled posts 1542 to address this problem byrotating under a lower applied force than is required for the straps toovercome the friction forces between components. In some otherembodiments, the first and/or second straps 1510 can comprise inelasticmaterial.

The length of the straps 1510 can be shortened and, thus, the size ofthe headgear 1500 reduced, by pulling the strap ends 1512 away from thebuckle 1520. The length of the straps 1510 can be lengthened by pullingthe head contacting portion 1514 of the straps away from the buckle1520.

Single Strap Headgear with Variable Elasticity

In certain embodiments, a headgear, e.g., for a respiratory mask, caninclude at least one side strap comprising a plurality of regions. Eachregion can differ from the other regions in at least one property. Theproperty can include elasticity, flexibility, density, and/or geometry.As an example, FIG. 16 shows headgear 1600 comprising two side straps1610 (only one is visible) that are configured to be adjustably attachedto each other by a connector such as a buckle (not shown) at one end(e.g., at the rear of a user's head) and that connect to a mask frame1620 at the other end. The side straps 1610 comprise first, second,third and fourth regions, 1612, 1614, 1616, 1618, which differ from eachother in at least one physical attribute. The four regions 1612, 1614,1616, 1618 are elongate and configured to be connected to each other inseries (e.g., end on end). The four regions 1612, 1614, 1616, 1618 maybe connected together by any suitable process, including, but notlimited to, sewing or welding.

The first region 1612 is configured to connect with the mask frame 1620at one end and to extend over the user's cheek (in use) to a second endthat is proximal to the user's temple. In some embodiments, it comprisesa laminated material such as neoprene or Breath-o-prene™, having atleast one layer of relatively high density foam. The first region 1612is substantially inelastic and configured to provide a substantiallystable connection to the mask frame 1620 via a hook, clip or othersuitable connecting component. The first region 1612 can be asubstantially straight region. The geometry of this section (i.e., thethickness and the width) in combination with the material used willprovide more flexibility in one direction than in others. There will begreater flexibility in a direction that is substantially normal to auser's face (in use) than there is in a vertical direction (when a useris sitting in an upright position). Flexibility that is normal to theuser's face may help the headgear 1600 to conform to the facial geometryof each individual user. The restricted vertical flexibility can help tominimize vertical rolling movement of the respiratory mask on a user'sface.

In various embodiments, the second region 1614 is made from a materialthat is substantially the same as the first region 1612 and providessimilar stability. It comprises a ‘dog leg’ or ‘s’ shaped profile havingan angle or curvature which allows the side strap 1610 to sit below theuser's eyes and above their ears, such that the user's peripheral visionis not significantly obstructed and such that no force is applied to theuser's ears, each of which may be beneficial for user comfort. Forexample, the profile of the second region 1614 can include an angle orcurve above and forward of the user's ear. The density of the chosenmaterial is such that forces applied through the headgear 1600, duringuse, do not deform the dog-leg shape and cause the side strap 1610 tocome into contact with the user's ears or get too close to their eyes.In an alternative embodiment, the first and second regions 1612 and 1614can be formed as a single component.

The third region 1616 of the side strap 1610 can be substantiallyelastic. For example, in some embodiments, the third region 1616 of theside strap 1610 comprises a length of elastic. In some embodiments, thelength of elastic may be circular knitted elastic. This substantiallyelastic section is configured to allow the headgear 1600 to be stretchedover a user's head to make donning and doffing the respiratory maskquick and easy.

In some embodiments, the fourth region 1618 comprises an elongatesection of a laminated material, such as a material comprising neopreneor Breath-o-prene™, that has a relatively lower density than thematerial of the first and second regions 1612, 1614. This providessufficient flexibility in some embodiments to allow the fourth region1618 to pass through a buckle and double back on itself to form a lengthadjustment means for the headgear. The fourth region also comprises alength securing tab 1619 at the end that is not connected to the thirdregion 1616. In some embodiments, the length securing tab 1619 comprisesthe hook component of a ‘hook and loop’ fastening system, such asVelcro™. It can be configured to connect to a loop component that isformed by a fabric layer of the laminated material of the fourth region1618. The fourth region 1618 is substantially inelastic, which enablesit to slide freely through the buckle (not shown) without stretchingwhen the length securing tabs are pulled on.

Alternative embodiments of the headgear 1600 may comprise differentcurved shapes to pass between a user's eyes and ears. The number ofdiffering regions may vary between embodiments. For instance, oneembodiment may not include an elastic region and may rely on a moreelastic laminated material (e.g., Breath-o-prene™) region to aide indonning and doffing of the mask. In yet another embodiment, the fourthregion 1618 may be replaced by an extended elastic third section 1616.

Single Strap with Resilient Core

FIG. 17 shows an embodiment wherein a headgear 1700 comprises a singletubular strap 1710 and a resilient core (not visible). The strap 1710comprises a first strap end, a second strap end, and a lengththerebetween. The resilient core comprises a first core end and a secondcore end. In some embodiments, the strap 1710 comprises a fabric. Thestrap 1710 can comprise elastic or inelastic material. As one example,the strap 1710 comprises a knitted elastic strap. In some embodiments,each of the first strap end and the second strap end extendsrespectively beyond the first core end and the second core end of theresilient core. Each of the first strap end and the second strap end canpass through a corresponding connector configured to couple the headgearto a mask. For example, in some embodiments, the strap 1710 is tubularand is configured to encase and conform to the shape of the resilientcore. The strap ends 1712 may be open or sealed (once threaded over theresilient core) and are configured to be passed through a connector1720. As shown in FIG. 17, the connector 1720 comprises a hook 1722,which is configured to connect to a mask frame 1730, and a loop 1724,through which the strap 1710 is configured to pass. The length of thestrap 1710 is configured to be adjusted by moving the strap end 1712through the loop 1724.

In some embodiments, the resilient core is configured to extend aroundthe back of a user's head from one cheek to the other, passing betweenthe eyes and ears. In some embodiments, the resilient core comprises amoulded plastic. The resilient core can be made from a resilient butflexible material, such as, but not limited to, nylon or polypropylene,which allows the resilient core to substantially maintain its mouldedshape during use. The resilient core is relatively flexible in adirection that is substantially normal to the user's head (when the maskis in use), such that the headgear 1700 may somewhat conform to theuser's head. The material selection and width of the resilient coreminimizes the flexibility of the headgear in a vertical direction (inuse, with a user sitting in an upright position), which may provide theheadgear 1700 with stability on the user's head.

The resilient core can comprise a three-dimensional structure thatpasses below a user's eyes and above a user's ears to avoid discomfortof the strap 1710 being too close to the user's eyes or applyingpressure to the top of the user's ears. For example, in someembodiments, the resilient core comprises a ‘dog leg’ or ‘s’ shapedprofile, e.g., having an angle or curvature, that is configured togenerally avoid the user's eyes and ears. The resilient core can also beconfigured to extend forward of a user's ears and rearward of the mask.For example, in some embodiments, the resilient core is furtherconfigured such that it does not extend through the entire length of thestrap 1710. There is a gap between the ends of the resilient core andwhere the strap 1710 passes through the loop 1712 of the connectors1720. This gap provides a section in the strap 1710 that is capable ofstretching during donning and doffing of the headgear 1700 and theattached respiratory mask. The gap also provides a flexible section nearstrap ends 1712 that is threaded through the connector 1720 and doubledback on itself in order to adjust the length of the strap 1720 and,thus, the overall headgear size. Once the headgear 1700 has beenadjusted to the user's desired size, the strap ends 1712 are secured inplace by any suitable fixing means, such as, but not limited to,mechanical clips or Velcro™ tabs.

As used herein, the term respiratory mask refers to any sealing ornon-sealing mask or patient interface that may be used to deliverrespiratory therapy to the airways of a patient. Respiratory masksand/or respiratory interfaces include, but are not limited to, full facemasks configured to seal about the nose and mouth of a patient, nasalmasks that seal around or under a patient's nose, direct nasal masks orinterfaces that include prongs or pillows that seal about a patient'snares, or non-sealing interfaces such as but not limited to nasalcannula.

Unless the context clearly requires otherwise, throughout thedescription and the claims, the words “comprise”, “comprising”, and thelike, are to be construed in an inclusive sense as opposed to anexclusive or exhaustive sense, that is to say, in the sense of“including, but not limited to.”

Where, in the foregoing description reference has been made to integersor components having known equivalents thereof, those integers orcomponents are herein incorporated as if individually set forth.

The disclosed methods, apparatus and systems may also be said broadly tocomprise the parts, elements and features referred to or indicated inthe disclosure, individually or collectively, in any or all combinationsof two or more of said parts, elements or features. For example, variousembodiments of a headgear are disclosed herein with features such as oneor more straps and connectors. It is understood that one or morefeatures from one embodiment can be used with one or more features fromother embodiments. Also, in embodiments that utilize a plurality of acertain feature, e.g., a plurality of straps or a plurality ofconnectors, it is understood that the plurality can be the same ordifferent from each other. Furthermore, the material, shape, size,color, and/or other physical properties of certain features (e.g.,straps, connectors) can be based on the intended mask, user, and/orexpected force to counteract.

Recitation of ranges herein is merely intended to serve as a shorthandmethod of referring individually to each separate sub-range or valuefalling within the range, unless otherwise indicated herein, and eachseparate sub-range or value is incorporated into the specification as ifit were individually recited herein.

Reference to any prior art in this specification is not, and should notbe taken as, an acknowledgement or any form of suggestion that thatprior art forms part of the common general knowledge in the field ofendeavour in any country in the world.

Although the present disclosure has been described in terms of certainembodiments, other embodiments apparent to those of ordinary skill inthe art also are within the scope of this disclosure. Thus, variouschanges and modifications may be made without departing from the spiritand scope of the disclosure. For instance, various components may berepositioned as desired. Moreover, not all of the features, aspects andadvantages are necessarily required to practice the present disclosure.Accordingly, the scope of the present disclosure is intended to bedefined only by the claims that follow.

1.-35. (canceled)
 36. A headgear for a respiratory mask, the headgearcomprising: a first strap; a second strap; a pair of buckles comprisinga corresponding buckle for the first and second straps, eachcorresponding buckle comprising: a glider portion; a strap attachmentportion; and a pivot connection between the glider portion and the strapattachment portion, wherein each of the first and second strapscomprises a first end, a second end, and a length therebetween, whereineach of the first and second straps is configured to connect to therespiratory mask at the first end, to adjustably couple to thecorresponding buckle at the glider portion, and to be fixedly coupled tothe strap attachment portion of another buckle of the pair of buckles atthe second end, and wherein each buckle is configured to move along thelength of the first or second strap to adjust the size of the headgear,wherein, for at least one of the pair of buckles, the glider portion orthe strap attachment portion comprise a circular profile and overlapsuch that the buckle forms a single circular profile.
 37. The headgearof claim 36, wherein the glider portion comprises an entry slot and anexit slot through which the first strap or the second strap extendsthrough each of the entry slot and the exit slot such that the firststrap or the second strap extends radially across a diameter of theglider portion.
 38. The headgear of claim 37, wherein the entry slot ispositioned on a first side of the glider portion and the exit slot ispositioned on a second side of the glider portion, wherein the firstside is opposite the second side.
 39. The headgear of claim 36, whereinthe glider portion and the strap attachment portion are pivotablyconnected through a central axis passing through a center of the gliderportion and a center of the strap attachment portion.
 40. The headgearof claim 36, wherein the strap attachment portion comprises a wall, anouter ring, and a sidewall extending between the wall and the outerring.
 41. The headgear of claim 40, wherein a first side of the wallcomprises a surface for strap connection, wherein a second side of thewall comprises a snap-fit dome, wherein the first side of the wall isopposite the second side of the wall.
 42. The headgear of claim 41,wherein the glider portion comprises a snap-fit ring configured toreceive the snap-fit dome of the strap attachment portion.
 43. Theheadgear of claim 42, wherein the snap-fit ring can rotate about thesnap-fit dome.
 44. The headgear of claim 42, wherein the glider portioncomprises a path for the first strap or the second strap to extendradially across a diameter of the glider portion.
 45. The headgear ofclaim 44, wherein the snap-fit dome extends into the path of the gliderportion, wherein the snap-fit dome is configured to apply a frictionforce to the first strap or the second strap positioned in the path ofthe glider portion.
 46. The headgear of claim 40, wherein the first sideof the wall comprises a flat surface.
 47. The headgear of claim 41,wherein the snap-fit dome comprises a planar surface.
 48. The headgearof claim 40, wherein the sidewall is a cylindrical wall, wherein thesidewall comprises an entry slot configured to receive the first strapor the second strap.
 49. The headgear of claim 40, wherein the outerring of the strap attachment portion comprises a central opening toexpose a portion of the first strap or the second strap received withinthe strap connection portion.
 50. The headgear of claim 36, wherein thefirst or second strap comprises a tubular structure.
 51. The headgear ofclaim 36, wherein for each of the pair of buckles, the glider portion orthe strap attachment portion comprise a circular profile and overlapsuch that the buckle forms a single circular profile.